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In this article, the editor introduces in detail "how to repair the broken U disk of xp computer". The content is detailed, the steps are clear, and the details are handled properly. I hope this article "how to repair the broken U disk of xp computer" can help you solve your doubts.

1. The USB disk is inserted into the machine without any response to the data repair of the USB disk:

Any USB flash drive that wants to work must have the following conditions:

(1) Power supply, which is divided into the power supply required by the main control and the power supply required by the FLASH, these two are the keys, and the U disk circuit is very simple. If there is no power supply, it is generally caused by the damage of the insurance inductor or the 3.3V voltage stabilizer. When it comes to the voltage stabilizer block, it also has three pins that are power input (5V), ground and power output (3.3V). The working principle is that when the input pin inputs a 5V voltage. The output pin will output a steady 3.3V. As long as we find out where the root cause of the lack of power supply is, the problem will be easily solved.

(2) clock, because the main control can only work at a certain frequency, and the communication with FLASH also needs * clock signal to be transmitted, so if there is no clock signal, the main control will not work. When checking this aspect of the circuit, in fact, the clock generation circuit is very simple, only need to check the crystal oscillator and its peripheral circuit, because the crystal oscillator is afraid of brush and the U disk is small and easy to cause crystal oscillator damage, as long as the same crystal oscillator can be replaced. Note: Crystal oscillator can not be measured, the best way to judge whether it is good or bad is to replace a good crystal oscillator.

(3) main control, if the above two conditions are normal, then the main control chip is damaged. As long as the master is changed.

2. Insert the USB disk into the computer and prompt "unrecognized device".

Maintenance idea: for this phenomenon, the first point shows that the circuit of the U disk is basically normal, but there is only a failure in communication with the computer, and there are the following points to check for communication:

(1) U disk interface circuit, there is no special component in this circuit is two data lines D + Dmur. so when checking this circuit, as long as you measure whether the line between the data line and the main control circuit is normal, generally, two small resistance values will be connected in series between the data line and the main control circuit to play the role of protection, so check whether the resistance values of these two resistors are normal.

(2) clock circuit, because the communication between the U disk and the computer should be carried out at a certain frequency, if the working frequency of the U disk and the computer can not be synchronized, then the system will think that this is an "unrecognizable device". At this time, it is time to change the crystal oscillator. And in the actual maintenance, there are really many examples of crystal oscillator damage!

(3) Master control, if the above two checks are normal, then it can be judged that the master control is damaged.

3, can recognize U disk, but open prompt "disk has not been formatted" but the system cannot format, or prompt "Please insert disk", computer prompt: "Please insert disk into drive H", "prompt format" Open U disk is garbled, capacity does not match itself, and so on.

Maintenance idea: for this phenomenon, it can be judged that the hardware of the U disk itself is not a big problem, but only a software problem.

Solution: just find the repair tool of the main control scheme and do it. This is up to everyone to see what the main control of the USB flash drive is.

After reading this, the article "how to repair the broken U disk of xp computer" has been introduced. If you want to master the knowledge of this article, you still need to practice and use it yourself to understand it. If you want to know more about related articles, welcome to follow the industry information channel.

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